Renesas R5F100GKDNA#20

Overview

R5F100GKDNA#20 from Renesas is a 48-pin, HWQFN-packaged 16-bit RL78/G13 microcontroller with 256 KB flash, 8 KB data flash, and 20 KB RAM, operating from 1.6 V to 5.5 V across –40°C to +105°C. It delivers 41 DMIPS at 32 MHz, integrates RTC, 10-bit ADC (24 channels), UART/SPI/I²C interfaces, and ultra-low-power modes (0.57 μA in STOP with RTC+LVD), targeting industrial sensor nodes and battery-powered control systems.

For engineers reviewing the R5F100GKDNA#20 datasheet, R5F100GKDNA#20 pinout, R5F100GKDNA#20 application, or R5F100GKDNA#20 equivalent, key selection criteria include industrial temperature support (–40°C to +105°C), on-chip data flash rewrite endurance (1,000,000 cycles), real-time clock calendar functionality, and hardware DMA for low-CPU-overhead peripheral transfers.

Technical Context

The R5F100GKDNA#20 implements the RL78 CPU core with 3-stage pipeline CISC architecture, supporting instruction execution times from 0.03125 μs (32 MHz high-speed mode) to 30.5 μs (32.768 kHz subsystem clock). It features dual-clock domains: high-speed on-chip oscillator (±1.0% accuracy, selectable 1–32 MHz) and dedicated low-speed oscillator for watchdog and RTC.

Its peripheral set includes up to 16× 16-bit timers, 1× 12-bit interval timer, 1× real-time clock with calendar/alarm/correction, 1× watchdog timer, and serial interfaces-CSI (SPI-compatible), UART/LIN, and I²C-configured across 3–10 channels depending on variant. The device supports background operation during data flash rewriting via BGO.

Key Specifications

Pinout & Package

Package: 48-pin HWQFN (7 × 7 mm, 0.5-mm pitch), moisture sensitivity level (MSL) 3, RoHS-compliant, lead-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with R5F100GKDNA#20, R5F101GKDNA#20 removes data flash to reduce cost and complexity for fixed-parameter systems, while R5F100GLDNA#20 expands I/O count and serial interface capacity in a larger LQFP package - both retain identical CPU performance, low-power behavior, and industrial temperature rating.

Availability

R5F100GKDNA#20 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meters, PLC I/O modules, and HVAC controllers requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for R5F100GKDNA#20 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/G13 family targets cost-sensitive, ultra-low-power industrial and consumer applications requiring robust real-time control, integrated analog, and secure firmware update capability - optimized for rapid development with scalable memory and peripheral options.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating for the R5F100GKDNA#20?

The R5F100GKDNA#20 operates at up to 32 MHz using its high-speed on-chip oscillator and achieves 41 DMIPS (Dhrystone MIPS) at that frequency. This performance level is confirmed in the official RL78/G13 datasheet (R01DS0131EJ0380 Rev.3.80) and reflects the efficiency of the 3-stage pipeline RL78 CPU core under typical conditions with cache disabled.

Does the R5F100GKDNA#20 include an integrated temperature sensor, and if so, how is it accessed?

Yes, the R5F100GKDNA#20 includes an integrated temperature sensor accessible via the 10-bit ADC. It is enabled by setting the TSD bit in the ADC Control Register 0 (ADCR0) and selecting the internal temperature sensor channel (ANI25) in the ADC Channel Select Register (ADS). Calibration data is stored in ROM, enabling accurate ambient temperature measurement across the –40°C to +105°C range.

What packaging and moisture sensitivity level (MSL) apply to the R5F100GKDNA#20?

The R5F100GKDNA#20 uses a 48-pin HWQFN package (7 × 7 mm, 0.5-mm pitch) with exposed thermal pad, compliant with JEDEC MSL Level 3. This requires floor life management per J-STD-020 - the device must be soldered within 168 hours after opening the dry pack unless baked according to standard reflow guidelines.

How many serial communication interfaces does the R5F100GKDNA#20 support, and what protocols are implemented?

The R5F100GKDNA#20 supports up to 10 serial channels across three interface types: CSI (SPI-compatible, up to 8 channels), UART/LIN (up to 4 channels, with LIN 2.2/ISO 17987 compliance), and I²C/Simplified I²C (up to 10 channels). These are implemented in shared peripheral modules - e.g., P10–P13 can serve as SCK00/SI00/SO00/SS00 (CSI) or SCL00/SDA00 (I²C) - requiring configuration via the Serial Array Unit (SAU) registers.

Is the R5F100GKDNA#20 compatible with Renesas' E2 studio and CS+ development environments?

Yes, the R5F100GKDNA#20 is fully supported in Renesas' E2 studio IDE and CS+ integrated development environment. Both tools provide device-specific startup code, peripheral register views, flash programming, and debugging via the on-chip debug interface. The device is listed in the RL78/G13 device database with validated linker scripts, HAL drivers, and sample projects for ADC, RTC, and serial communication.